HBASE-9319 Apply 'HBASE-7685 Closing socket connection can't be removed from SecureClient' to trunk

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1516886 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9320 Up timeouts on NamespaceUpgrades timeouts

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1516898 13f79535-47bb-0310-9956-ffa450edef68